package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;

@Service
public class DishServiceImpl implements DishService {

    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private DishFlavorMapper dishFlavorMapper;
    @Autowired
    private SetmealDishMapper setmealDishMapper;

    /**
     * 新增菜品
     * @param dishDTO
     */
    @Override
    @Transactional
    public void saveWithFlavor(DishDTO dishDTO) {
        Dish dish =new Dish();
        BeanUtils.copyProperties(dishDTO,dish);

        dishMapper.insert(dish);
        Long id = dish.getId();

        List<DishFlavor> flavor= dishDTO.getFlavors();
        if(flavor !=null && !flavor.isEmpty()){
            flavor.forEach(dishFlavor -> {
                dishFlavor.setDishId(id);
            });
            dishFlavorMapper.insertBatch(flavor);
        }
    }

    /**
     * 菜品分页查询
     * @param dishPageQueryDTO
     * @return
     */
    @Override
    public PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO) {
        PageHelper.startPage(dishPageQueryDTO.getPage(), dishPageQueryDTO.getPageSize());
        Page<DishVO> page = dishMapper.pageQuery(dishPageQueryDTO);
        return new PageResult(page.getTotal(), page.getResult());

    }

    /**
     * 批量删除菜品
     * @param ids
     */
    @Transactional
    @Override
    public void deleteBetch(List<Long> ids) {
        //判断是否启用
        for (Long id : ids) {
            Dish dish=dishMapper.getById(id);
            if(dish.getStatus()== StatusConstant.ENABLE){
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }
        }

        //判断是否关联套餐
        List<Long> setmealIds = setmealDishMapper.getSetmealIdsByDishIds(ids);
        if(setmealIds!=null || !setmealIds.isEmpty()){
            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
        }

//        for (Long id : ids) {
//            dishMapper.deleteById(id);
//            dishFlavorMapper.deleteByDishId(id);
//        }

        dishMapper.deleteById(ids);

        dishFlavorMapper.deleteByDishId(ids);


    }

    /**
     * 根据id获取菜品（含口味）
     * @param id
     * @return
     */
    @Override
    public DishVO getByIdWithFlavor(Long id) {
        Dish dish =dishMapper.getById(id);
        List<DishFlavor> dishFlavors=dishFlavorMapper.getByDishId(id);
        DishVO dishVO =new DishVO();
        BeanUtils.copyProperties(dish,dishVO);
        dishVO.setFlavors(dishFlavors);
        return dishVO;
    }


    /**
     * 根据id修改菜品信息和对应口味
     * @param dishDTO
     */
    @Override
    public void updateWithFlavor(DishDTO dishDTO){
        Dish dish=new Dish();
        BeanUtils.copyProperties(dishDTO,dish);
        //基本菜品数据处理
        dishMapper.update(dish);

        //处理口味
        dishFlavorMapper.deleteById(dishDTO.getId());

        //重新加入口味
        List<DishFlavor> flavor=dishDTO.getFlavors();
        if(flavor !=null && !flavor.isEmpty()){
            flavor.forEach(dishFlavor -> {
                dishFlavor.setDishId(dishDTO.getId());
            });
            dishFlavorMapper.insertBatch(flavor);
        }

    }

    /**
     * 根据分类id查询菜品
     * @param dish
     * @return
     */
    @Override
    public List<DishVO> listWihFlavor(Dish dish) {
        List<Dish> dishList=dishMapper.list(dish);

        List<DishVO> dishVOList=new ArrayList<>();

        for (Dish d : dishList) {
            DishVO dishVO=new DishVO();
            BeanUtils.copyProperties(d,dishVO);
            List<DishFlavor> flavorList = dishFlavorMapper.getByDishId(d.getId());
            dishVO.setFlavors(flavorList);
            dishVOList.add(dishVO);
        }

        return dishVOList;
    }

    /**
     * 根据分类id查询菜品
     * @param categoryId
     * @return
     */
    public List<Dish> list(Long categoryId) {
        Dish dish = Dish.builder()
                .categoryId(categoryId)
                .status(StatusConstant.ENABLE)
                .build();
        return dishMapper.list(dish);
    }

    /**
     * 启用、禁用分类
     * @param status
     * @param id
     */
    public void startOrStop(Integer status, Long id){
        Dish dish=Dish.builder()
                .id(id)
                .status(status)
                .build();
        dishMapper.update(dish);
    }
}
